Everything You Need to Know About Juicing

Can fruit and vegetable juices really sharpen your edge and turbocharge vitality? Experts weigh in on the trend—and tell you how to do it right.

by Julie D. Andrews

With the influx of health nuts and fitness junkies slamming back cold-pressed juices, you'd be hard-pressed not to think about juicing. But, is it healthy and beneficial enough to be storming the juice bar or cranking out your own concotion; or is it just a health fad?

Well, you already know that diets packed with fruits and vegetables reduce your risk for chronic conditions and diseases that can lead to an untimely death; but produce also plays a key roll in weight management. And odds are good you're not getting the five servings a day recommended by the USDA. (In fact, CDC data shows only a third of US adults eat two-plus fruits, and about a quarter get three-plus veggies, daily. Yikes.) So to close up that gap, most experts agree that juicing can help pack more nutrients into your day. There’s some research (like this study in the journal Nutrition) that supports that recommendation as well.

Still, it’s not as simple as chugging juice. Here’s what nutrition experts say you need to know.

1. Supplement, don’t cleanse. Nutritionists largely agree that juicing can offer a low-fat, nutrient-rich jolt of energy when added to already healthy, balanced diets—but as far as the cleanse-for-weight-loss meal replacement trend? Skip it. Juice digests quickly, and can cause the type of extreme hunger that leads to overeating and binging. “Drinking juice in lieu of eating food is not healthy or sustainable, no matter how nutrient-packed,” says Marjorie Nolan Cohn, RD, a national spokesperson for the Academy of Nutrition and Dietetics. Juice cleanses (read: fasts) can also lead to unstable blood sugar, headaches, and lightheadedness. So, yeah, your workouts aren't going to happen; or you'll be so exhausted during them you won't have the energy to keep up and can up your odds for injury.

2. Pick the right ingredients. Certain vitamins are more easily absorbed as juice, like vitamin C and Bs, while others, like vitamin A, E, K are best taken through the full digestion process, says Cohn. And some vegetables, such as tomatoes, actually provide more nutritional value when cooked, points out Kelly O’Connor, RD, LDN, a registered dietician at Baltimore-based Mercy Medical Center. Keeping all this in mind, these best bets that will maximize nutrition: leafy greens (spinach, collard greens, swiss chard, kale, mustard greens), kiwi, papaya, grapefruit, red bell peppers, broccoli, strawberries, oranges, asparagus and garlic. Cherie Calbom, MS, CN, author of The Juice Lady’s Big Book of Juices & Green Smoothies also favors parsley, blood-pressure-lowering beets (combine with carrot or apple to enhance taste), inflammation-fighter ginger root, potassium-packed cucumbers, and antibacterial lemons. Avoid overly mushy or tender fruits, like bananas (if craving potassium, use half) and peaches, which can make your juice too thick and mushy, says Cohn.

3. Find the perfect mix. Warning: Vegetable juice might not knock your socks off at first, so you’ve got to experiment. Plot how you'll keep a variety of produce stocked, then have fun with it. Start with two cups of greens, which can taste bitter, balanced by one piece of fruit. Then, play around with the ratio, adding cayenne pepper or cinnamon for extra seasoning if desired. (Still not sure where to begin? We asked the experts for their favorite combos—grapefruit-orange-kale-cucumber for Cohn and carrot-apple-ginger for Calbom.)

4. Sip fast. Whipping up batches of liquid vitality for the week, or even day, isn’t most potent. “Guzzle that juice immediately,” says Cohn. “By changing the texture and integrity of fruits and vegetables from solid to liquid and removing protective skins, the foods quickly start to lose nutrients.”